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Agilent Technologies manual Amplitude Modulation AM, To Select AM, U2761A User’s Guide

Models: U2761A

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Features and Functions

Amplitude Modulation (AM)

A modulated waveform consists of a carrier waveform and a modulating waveform. An example of the AM waveform is shown in Figure 2- 14. In AM, the amplitude of the carrier is varied by the instantaneous voltage of the modulating waveform. The amount of amplitude modulation is called the modulation depth which refers to the portion of the amplitude range that will be used by the modulation.

Modulating frequency

AM depth

Figure 2-14 AM waveform

To Select AM

The U2761A allows only one modulation mode at a time. The

U2761A does not allow modulation when sweep is enabled.

U2761A User’s Guide

Page 67

Image 67

Agilent Technologies manual Amplitude Modulation AM, To Select AM, U2761A User’s Guide

Contents

User’s Guide Agilent U2761A USB Modular Function/Arbitrary Waveform GeneratorAgilent Technologies C A U T I O N WarrantySafety Notices NoticesU2761A User’s Guide Safety SymbolsDo not operate the product in an explosive atmosphere or in the General Safety InformationWARN IN G C A U T I O NRequirements Environment ConditionsU2761A User’s Guide Regulatory Markings Do not dispose in domestic household waste Waste Electrical and Electronic Equipment WEEE Directive 2002/96/ECU2761A User’s Guide Standard Declaration of ConformityVIII U2761A User’s GuideRegulatory Information for Canada U2761A User’s GuideAdditional Information 1Performance Criteria1 Getting Started 2 Features and Functions3 Characteristics and Specifications In This Guide…XVII ContentsInstallation Chassis InstallationFeatures and Functions ContentsTo Select PM Phase Modulation PMPhase Deviation Contents3 Characteristics and Specifications Product Specifications and CharacteristicsIndex ContentsPM waveform List of FiguresAM waveform FM waveformU2761A User’s Guide Carrier frequency for PSK Table 1-1 Synchronous Simultaneous Interface SSI connectorList of Tables U2761A User’s GuideU2761A User’s Guide XVIIIAgilent Technologies Getting StartedAgilent U2761A USB Modular Function Generator User’s Guide Introduction Various features of the U2761A1 Getting Started U2761A User’s Guide Product at a GlanceProduct Outlook Top ViewTrigger in connector Output connector Trigger out connector Front ViewRear View USB indicator Power indicator 10 MHz reference connectorFront View Product DimensionsDimensions Without Bumpers Top View1 Getting Started Dimensions With BumpersTop View Front ViewU2761A User’s Guide Standard Purchase ItemsElectrical Check Inspection and MaintenanceGeneral Maintenance Initial InspectionU2761A User’s Guide Installation and ConfigurationInstallation N O TE1 Getting Started A. Check Your SystemHard-disk space 1 GB U2761A User’s Guide B. Install the IO Libraries SuiteN O TE N O TEN O TE C. Install the Module Driver1 Getting Started U2761A User’s Guide D. Install the Agilent Measurement Manager1 Getting Started N O TE10 Fill in the Customer Information Form accordingly and click Next U2761A User’s Guide E. Connect the Module to Your PCN O TE Yes, this time only and click Next to proceedU2761A User’s Guide 1 Getting StartedGo to Start Control Panel and double-click System Select Ignore to disable the warning messageN O TE follow the instructions below8 The Assign USB device alias window will appear. Each time the U2761A is plugged in, this dialog box will appear. To 1 Getting StartedN O TE F. Verify Your Module ConnectionU2761A User’s Guide 1 Getting Started Send Commands To This Instrumentsoftware G. Launch Your Agilent Measurement ManagerN O TE Double-click the Measurement Manager software icon onthe Agilent Measurement Manager help file For more information on how to use the Measurement Manager, refer toN O TE 1 Getting StartedGetting Started 55-Pin Backplane Connector Pin ConfigurationSSI timing signal U2761A User’s Guide1 Getting Started Chassis InstallationPhase-Shift Keying PSK Modulation Features and FunctionsOutput Configuration Phase Modulation PM2 Features and Functions Output ConfigurationIntroduction Output FunctionAmplitude Limitation Function LimitationU2761A User’s Guide Figure 2-1 U2761A soft front panel Soft Front Panel Operation2 Features and Functions Waveform pattern selection Waveform parametersRemote Interface Operation Output FrequencyU2761A User’s Guide Soft Front Panel Operation Function LimitationsDuty Cycle Limitations 2 Features and FunctionsThe default amplitude is 1 Vpp into 50 Ω for all functions Output AmplitudeOffset Voltage Limitations Limits Due to Output TerminationFigure 2-4 Panel view of the amplitude section Limits Due to Units Selection2 Features and Functions Soft Front Panel OperationRemote Interface Operation DC Offset VoltageLimits Due to Amplitude The default offset is 0 V for all functionsFigure 2-5 Panel view of the DC offset section 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationVOLTageUNIT VPPVRMSDBM Output UnitsSoft Front Panel Operation Remote Interface Operation2 Features and Functions Output TerminationU2761A User’s Guide Soft Front Panel OperationRemote Interface Operation Figure 2-6 Panel view of the Tools menu2 Features and Functions Duty Cycle Square WavesDuty Cycle Limits Due to FrequencyU2761A User’s Guide Soft Front Panel OperationRemote Interface Operation Figure 2-8 Panel view of the duty cycle section0% Symmetry Symmetry Ramp Wave2 Features and Functions Soft Front Panel OperationFigure 2-11 Panel view of the output section Output ControlRemote Interface Operation Soft Front Panel OperationExample 1, To output a DC voltage Set Output Using SCPI Commands2 Features and Functions Remote Interface OperationExample 3, To output a Square wave Example 2, To output a Sine waveU2761A User’s Guide Example 4, To output a Ramp wave 2 Features and FunctionsRemote Interface Operation Pulse WaveformPulse Period Soft Front Panel OperationRemote Interface Operation Pulse Width2 Features and Functions Soft Front Panel OperationDuty Cycle = 100 ⋅ Pulse Width / Period Pulse Duty CycleSoft Front Panel Operation Remote Interface Operation2 Features and Functions Generate Pulse Waveform Using SCPI CommandsExample To Select AM Amplitude Modulation AMU2761A User’s Guide Remote Interface Operation Carrier Waveform2 Features and Functions Soft Front Panel OperationTable 2-3 Carrier frequency for AM Carrier FrequencyRemote Interface Operation Figure 2-16 Panel view of the Arbitrary waveformSoft Front Panel Operation Modulating Waveform2 Features and Functions The default modulating waveform is Sine waveN O TE Modulating Waveform FrequencyModulation Depth default modulation depth is 100%2 Features and Functions Generate AM Using SCPI CommandsExample To Select FM Frequency Modulation FMU2761A User’s Guide Remote Interface Operation 2 Features and FunctionsCarrier Waveform Soft Front Panel OperationU2761A User’s Guide Carrier FrequencyRemote Interface Operation Table 2-4 Carrier frequency for FMRemote Interface Operation 2 Features and FunctionsModulating Waveform Soft Front Panel OperationRemote Interface Operation Frequency DeviationModulating Waveform Frequency Soft Front Panel OperationRemote Interface Operation Generate FM Using SCPI Commands2 Features and Functions Soft Front Panel OperationTo Select PM Phase Modulation PMU2761A User’s Guide Remote Interface Operation 2 Features and FunctionsCarrier Waveform Soft Front Panel OperationRemote Interface Operation Carrier FrequencyRemote Interface Operation Soft Front Panel OperationModulating Waveform Frequency 2 Features and FunctionsThe default waveform is Sine wave Modulating WaveformSoft Front Panel Operation Phase DeviationGenerate PM Using SCPI Commands 0 to 360 . The default phase deviation setting isTo Select FSK Modulation Frequency-Shift Keying FSK Modulation2 Features and Functions Soft Front Panel Operation Carrier WaveformSoft Front Panel Operation Remote Interface OperationSoft Front Panel Operation FSK Carrier Frequency2 Features and Functions Remote Interface Operationfrequency is 100 Hz for all functions FSK “Hop” FrequencySoft Front Panel Operation Remote Interface OperationSoft Front Panel Operation Generate FSK Modulation Using SCPI CommandsFSK Rate 2 Features and FunctionsTo Select PSK Modulation Phase-Shift Keying PSK ModulationU2761A User’s Guide Remote Interface Operation 2 Features and FunctionsCarrier Waveform Soft Front Panel OperationRemote Interface Operation PSK Carrier FrequencyRemote Interface Operation Soft Front Panel OperationSoft Front Panel Operation PSK RatePSK Deviation 2 Features and FunctionsExample Generate PSK Modulation Using SCPI CommandsU2761A User’s Guide To Select ASK Modulation Amplitude-Shift Keying ASK Modulation2 Features and Functions Soft Front Panel Operation Carrier WaveformSoft Front Panel Operation Remote Interface OperationSoft Front Panel Operation 2 Features and FunctionsCarrier Frequency Remote Interface OperationRemote Interface Operation Generate ASK Modulation Using SCPI CommandsASK Rate Soft Front Panel OperationSoft Front Panel Operation Frequency SweepTo Select Sweep 2 Features and FunctionsFigure 2-28 Panel view of sweep Start Frequency and Stop FrequencyRemote Interface Operation Soft Front Panel OperationRemote Interface Operation Sweep ModeSweep Time 2 Features and FunctionsSoft Front Panel Operation Sweep Trigger SourceSoft Front Panel Operation Remote Interface OperationExample Set Frequency Sweep Using SCPI Commands2 Features and Functions Remote Interface OperationU2761A User’s Guide TriggeringTrigger Source Choices Soft Front Panel OperationRemote Interface Operation Internal TriggeringManual Triggering 2 Features and FunctionsRemote Interface Operation External TriggeringRemote Interface Operation Soft Front Panel OperationTrigger in Rising edge shown Figure 2-29 Trigger input pulse Trigger Input SignalTrigger Output Signal 2 Features and FunctionsU2761A User’s Guide Soft Front Panel OperationRemote Interface Operation falling edge, select Positive for rising edge and2 Features and Functions Set Triggering Using SCPI CommandsExample To Create and Store an Arbitrary Waveform Arbitrary WaveformsU2761A User’s Guide 3 Set the waveform voltage limits 2 Features and Functions1 Select the Arbitrary waveform function 2 Set the waveform period9 Exiting the waveform editor 6 Start waveform editing process7 Sending waveform to the U2761A 8 Saving the waveformU2761A User’s Guide 2 Features and FunctionsAgilent U2761A USB Modular Function Generator User’s Guide Characteristics and SpecificationsProduct Characteristics Product Specifications and Characteristics Agilent TechnologiesSAFETY COMPLIANCE Product Characteristics3 Characteristics and Specifications POWER CONSUMPTIONSquare Product Specifications and CharacteristicsWAVEFORM CHARACTERISTICS Sine WAVEFORMS3 Characteristics and Specifications Ramp, TrianglePulse ArbitraryInternal frequency reference COMMON CHARACTERISTICS AmplitudeDC offset Main output3 Characteristics and Specifications MODULATION AMU2761A User’s Guide SWEEP CHARACTERISTICSTRIGGER CHARACTERISTICS Trigger input Trigger outputU2761A User’s Guide 3 Characteristics and SpecificationsU2761A User’s Guide Indexoffset. Refer to DC offset phase noise PMlimits L-Mount kit 7Agilent Technologies, Inc First Edition, April 30 U2761-90000